/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/GroupTopology.h
Add all the Corners connected to the given Corner to the EdgesOut list. This is somewhat expensive as there is no connection from Corners to Corners, must iterate over adjacent faces/edges
void FindCornerNbrCorners ( int CornerID, [TArray](API\Runtime\Core\Containers\TArray)< int > & CornersOut ) const